Tapping arrangement for crucibles.



No. 865,037. PATENTED SEPT. 3, 1907. L. HEYNEMANN. TAPPING ARRANGEMENTFOR CRUGIBLES.

APPLIUATION FILED APB-26. 1906.

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THE NORRIS Ptriss cc., wnsnmcrau. n. c.

UNITED STATES PATENT OFFICE.

TAPPING ARRANGEMENT FOR CRUCIBLES.

Specification oi Letters Patent.

Patented Sept. 3, 1907.

Application filed April 26. 1906. Serial No. 313,872.

To all whom it may concern:

Be it known that I, LIONEL HEYNEMANN, of the city and county of SanFrancisco, State of California, have invented certain Improvements inthe Tapping Arrangements for Crucibles, of which the following is aspecification.

My invention relates to the tapping devices for crucibles or othervessels designed to hold molten material.

By the present method, particularly with crucibles having the tap holesin the bottom, it is necessary to drive a pin into said tap hole, whichpin periorates the plugging material in said hole, and allows the moltenmetal or other material contained in said crucible to flow out. This pinhas to be driven into the tap hole by a rod, with a flat end, some timescalled a tapping spade. This operation makes it necessary to stand closeto the crucible, which may be dangerous, as the metal may spatter as itspouts out of the tap hole. It the crucible were to give Way, the resultmight be very serious to the operator. Besides the location of the taphole may be such, as to make it dillicult to get requisite room forconveniently manipulating said tapping spade.

To avoid the danger mentioned, and to make the tapping operation moreconvenient and positive, I have designed the device illustrated by theaccompanying drawing in which Figure l. is a view, Fig. 2. a plan, andFigs. 3 & 4 details of parts of my device.

Similar letters refer to similar parts.

The device consists principally of three parts: the pivot A., the leverL., and the stirrup S. The pivot A., is arranged to be connected to anyconvenient part of the crucible by bands, clamps, or lugs bolted to thesame. In the drawing it is shown clamped to the flange of the crucibleby set-screws. (See Fig. 1.) The lever L., is arranged to turn on saidpivot. In the drawing (Fig. 2) it is shown in two parts, so as to clearthe flange of the crucible in its movement. At the end of the lever achain, cord or wire 0., is attached, which cord is led to any place atwhichthe operator desires to stand when the crucible is to be tapped. InFig. 1., I have shown the cord leading to a small guide-sheave D.,attached to the crucible. It may however, not be considered desirable orconvenient under certain conditions, to so attach said guide-sheave. Thestirrup S., is shown hung loosely to said lever so that, when the leveris moved, the stirrup also moves in a direction axial to the pin. Thestirrup is preferably made of thin iron, so as to take up little roombelow the tapping pin, and a hole H., is provided in said stirrup,through which the molten metal is allowed to flow. This hole is coveredby a thin piece W., of some material instantaneously destructible by theheat of the molten material, as it begins to flow from the tap hole. Inmost cases wood is to be preferred for the material of the cover-piece.This cover-piece, shown in Fig. 4 on a larger scale is shown held inplace on the stirrup by little ears E. E. bent out of the material ofthe stirrup. The coverpiece may be attached to the stirrup in anysuitable manner, or possibly not attached at all, and simply laid on thestirrup.

The tapping pin is shown in Fig. 1. at P., and may be either suspendedfrom the crucible and left hanging in the tap-hole or attached to thecover-piece.

The operation of my device above described is as follows: Beforetapping, the lever L., and the stirrup occupy the position shown in thedrawing Fig. 1. When the crucible is to be tapped the operator moves thelever, by means of the cord 0., into the position shown by the dottedlines F., Fig. 1. The tapping pin is struck by the cover plate W., andis forced by the same into the tapping hole. The molten metal burns itsway instantaneously through said thin destructible material of which thecover piece must necessarily be made, and flows through the hole H.,provided for this purpose in the stirrup.

It is not necessary that the arrangement shown should be strictlyadhered to. The main feature of my invention is atapping device operatedat some distance away from the crucible by a cord, which causes acertain part of the device to press against the pin in a direction axialto said pin, and which part being instantaneously destroyed by the metalforms no obstruction to its flow.

What I claim and desire to secure by Letters Patent is:-

1. In combination with a crucible for molten material, a tapping deviceat the bottom thereof-consisting essentially of the tapping pin, theplate W, of a material to be destroyed by the molten metal, andmechanical means for moving the plate to actuate the tapping pin,substantially as described.

2. In combination with a crucible for molten material, having a tappingpin extending through the bottom thereof, a plate W, of a material to bedestroyed by the molten metal, and means for moving the plate andtapping pin, substantially as described.

3. In combination with a crucible for molten material, having a tappingpin extending through the bottom thereof, a plate W, to be destroyed bythe molten metal, and means for moving the plate to actuate the tappingpin, substantially as described.

4. In combination with a crucible for molten material, having a tappingpin extending through the bottom thereof, a stirrup S provided with aspout hole I-I, covered by the plate W, of a material to be destroyed bythe molten metal, and means for moving the plate to strike the tappingpin substantially as described.

5. In combination with a crucible for molten material, a tapping deviceat the bottom thereof consisting of the tapping pin P, the movablestirrup S bearing the plate W, and the means for moving said stirrup andplate to actuate the tapping pinfor the purpose set forth.

6. In combination with a crucible for molten material,

having a tapping pin extending through the bottom thereof, the movablestirrup S bearing the plate W, and the means for moving said stirrup andplate to actuate the tapping pin, consisting of the lever L and cord C,substantially as described.

7. A tapping device for crucibles for molten material, consisting of apin at the bottom thereof, and means for thrusting the' pin through theplugging material of said crucible consisting essentially of the movablestirrup S,

actuating said tapping pin, lever L moving said stirrup S, 10 and cord Coperating said lever L, substantially as (lescribed, & for the purposesset forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses LIONEL HEYNEMANN.

Witnesses FLORENCE LACHMAN, GARDNER LANDON.

